Physics Letters B最新文献_第10页

A comprehensive search for leptoquarks decaying into top-τ final states at the future LHC 在未来的大型强子对撞机中对轻夸克进入顶τ最终态的全面搜索

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-22 DOI: 10.1016/j.physletb.2026.140194

Debabrata Sahoo , Rameswar Sahu , Kirtiman Ghosh

引用次数: 0

No-bomb theorem for weakly magnetized Reissner-Nordström black holes: A linear-order analysis 弱磁化Reissner-Nordstr黑洞的无弹定理：一个线性阶分析

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-29 DOI: 10.1016/j.physletb.2026.140220

Haryanto M. Siahaan

{"title":"No-bomb theorem for weakly magnetized Reissner-Nordström black holes: A linear-order analysis","authors":"Haryanto M. Siahaan","doi":"10.1016/j.physletb.2026.140220","DOIUrl":"10.1016/j.physletb.2026.140220","url":null,"abstract":"<div><div>We study the superradiant stability of magnetized Reissner–Nordström black holes against charged, massive scalar perturbations at linear order in the magnetization parameter <em>b</em>. At this order the Klein–Gordon equation is separable and the horizon acquires a magnetically induced angular velocity <span><math><mrow><msub><mstyle><mi>Ω</mi></mstyle><mi>H</mi></msub><mo>=</mo><mn>4</mn><mi>b</mi><mi>Q</mi><mo>/</mo><msub><mi>r</mi><mo>+</mo></msub></mrow></math></span>, enlarging the superradiant band to <span><math><mrow><mi>ω</mi><mo><</mo><mi>m</mi><msub><mstyle><mi>Ω</mi></mstyle><mi>H</mi></msub><mo>+</mo><mi>q</mi><msub><mstyle><mi>Φ</mi></mstyle><mi>H</mi></msub></mrow></math></span>. Despite this enhancement, a sign analysis of the quartic governing the extrema of the effective potential–validated by numerical scans–shows that no exterior barrier–well forms, including in the eikonal scaling (<em>m</em>, ℓ → ∞ with <span><math><mrow><mi>m</mi><mi>b</mi><mo>=</mo><mi>O</mi><mo>(</mo><mn>1</mn><mo>)</mo></mrow></math></span>). Without a trapping well, quasi-bound superradiant modes do not arise, and the black-hole bomb is therefore absent. We conclude that Hod’s no-bomb theorem remains robust for weakly magnetized, non-rotating black holes at <span><math><mrow><mi>O</mi><mo>(</mo><mi>b</mi><mo>)</mo></mrow></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"873 ","pages":"Article 140220"},"PeriodicalIF":4.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A gravitational spin-orbit interaction in Poincaré gauge theory 庞卡罗规范理论中的引力自旋轨道相互作用

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.physletb.2025.140126

Sebastian Bahamonde , Jorge Gigante Valcarcel

引用次数: 0

Variational neural network approach to QFT in the field basis 变分神经网络在QFT领域中的应用

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-24 DOI: 10.1016/j.physletb.2026.140183

K. Braga , N. Sato , A.P. Szczepaniak

引用次数: 0

Cross section and parametrization of charmonium decay charmonium衰变的截面和参数化

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-25 DOI: 10.1016/j.physletb.2026.140211

Xiao-Hu Mo , Jin-Tao Chen , You-Kai Wang

引用次数: 0

Beyond the Starobinsky model after ACT 超越了ACT之后的斯塔宾斯基模型

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-28 DOI: 10.1016/j.physletb.2026.140217

Min Gi Park , Dhong Yeon Cheong , Seong Chan Park

引用次数: 0

Quantum coherence of continuous variables in the black hole quantum atmosphere 黑洞量子大气中连续变量的量子相干性

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-18 DOI: 10.1016/j.physletb.2026.140185

Xiaofang Liu , Cuihong Wen , Jieci Wang

{"title":"Quantum coherence of continuous variables in the black hole quantum atmosphere","authors":"Xiaofang Liu , Cuihong Wen , Jieci Wang","doi":"10.1016/j.physletb.2026.140185","DOIUrl":"10.1016/j.physletb.2026.140185","url":null,"abstract":"<div><div>Recently, the concept of quantum atmosphere has been introduced as a potential origin of Hawking quanta. This study investigates the properties of quantum fields by exploring the quantum coherence of a two-mode Gaussian state near a black hole, where Hawking quanta originate from the quantum atmosphere region. It is demonstrated that both physically accessible and inaccessible quantum coherence for continuous variable quantum states distinctly exhibit hallmark features of the quantum atmosphere. Specifically, the quantum coherence for these states varies continuously with changes in the normalized distance; it undergoes rapid decreases (or increases) just outside the event horizon before gradually stabilizing through subsequent increases (or decreases). This behavior contrasts with the behaviors of quantum coherence where originates solely from the black hole’s event horizon. The quantum features of the fields distinctly reflect characteristics attributable to the quantum atmosphere, thereby deepening our understanding of the origins of Hawking radiation. We also find that the continuous variable coherence is highly dependent on both the squeezing parameter and field frequency of the prepared state; therefore, appropriately adjusting these values can enhance our ability to detect features within the quantum atmosphere. It is noteworthy to observe that quantum features of fields do not entirely dissipate in the quantum atmosphere region, indicating that tasks related to quantum information processing can still be executed there.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"873 ","pages":"Article 140185"},"PeriodicalIF":4.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charged axially symmetric exponential metric: Exact solutions to the Einstein-Maxwell equations 荷电轴对称指数度量：爱因斯坦-麦克斯韦方程组的精确解

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-17 DOI: 10.1016/j.physletb.2026.140186

S. Habib Mazharimousavi

{"title":"Charged axially symmetric exponential metric: Exact solutions to the Einstein-Maxwell equations","authors":"S. Habib Mazharimousavi","doi":"10.1016/j.physletb.2026.140186","DOIUrl":"10.1016/j.physletb.2026.140186","url":null,"abstract":"<div><div>We construct and analyze charged and magnetized extensions of the axially symmetric exponential metric, that is known as the Curzon-Chazy spacetime (CCS) within the Weyl class. Working within the Einstein-Maxwell framework, we first derive an exact charged axially symmetric exponential metric by directly solving the coupled field equations for a dyonic monopole configuration. The solution is shown to reduce smoothly to the vacuum CCS in the neutral limit and to the extremal Reissner-Nordström spacetime in a special parameter regime. We then rederive the same charged geometry using the Harrison transformation in the Ernst formalism, establishing the equivalence between the direct and solution-generating approaches. Subsequently, we apply the magnetic Harrison transformation to obtain a Melvin-type magnetized deformation of the spacetime. Finally, by implementing the Ehlers transformation, we generate a stationary but nonrotating swirling geometry endowed with a nonvanishing NUT charge, which we identify invariantly via the Komar dual mass. A further magnetic Harrison transformation yields a magnetized swirling (NUT-type) spacetime. These results demonstrate how electric, magnetic, and gravitomagnetic charges arise systematically from the CCS through exact solution-generating techniques.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"873 ","pages":"Article 140186"},"PeriodicalIF":4.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hints beyond ΛCDM from Barrow and Tsallis holographic dark energy with GO cutoff 线索超越ΛCDM从巴罗和萨利斯全息暗能量与GO切断

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-08 DOI: 10.1016/j.physletb.2026.140154

G.G. Luciano , A. Paliathanasis , G. Leon , A. Sheykhi , M. Motaghi

{"title":"Hints beyond ΛCDM from Barrow and Tsallis holographic dark energy with GO cutoff","authors":"G.G. Luciano , A. Paliathanasis , G. Leon , A. Sheykhi , M. Motaghi","doi":"10.1016/j.physletb.2026.140154","DOIUrl":"10.1016/j.physletb.2026.140154","url":null,"abstract":"<div><div>Barrow and Tsallis Holographic Dark Energy (HDE) are two recent extensions of the standard HDE framework, obtained by introducing generalized entropy corrections through the Barrow and Tsallis formalisms. In this work, we examine the cosmological consequences of Barrow and Tsallis HDE implemented with the Granda-Oliveros (GO) infrared (IR) cutoff. After deriving the modified Friedmann equations within the thermodynamic-gravity conjecture, we study the background evolution in both non-interacting and interacting dark sector scenarios, emphasizing the role of the entropic parameter in shaping late-time dynamics. We then confront the model with state-of-the-art observations, including PantheonPlus and Union3 Type Ia supernovae, Cosmic Chronometers and DESI DR2 BAO measurements. Using Bayesian MCMC methods, we constrain the model parameters and compare the performance of BHDE with that of ΛCDM. Our results show that BHDE is compatible with current data and can exhibit a mild statistical preference over the concordance model for certain dataset combinations. Overall, the analysis underscores the relevance of generalized entropy frameworks in late-time cosmology and identifies Barrow-Tsallis holography with the GO cutoff as a competitive alternative to ΛCDM.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"873 ","pages":"Article 140154"},"PeriodicalIF":4.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shape evolution in neutron-rich Rh isotopes: First measurement of negative-parity isomers in 117,119Rh 富中子Rh同位素的形状演化：117,119Rh中负宇称异构体的首次测量

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.physletb.2025.140144

J.Z. Zhang , Z.Q. Chen , T. Qu , Y.K. Wang , Z.H. Li , H. Hua , P.W. Zhao , H. Watanabe , G. Lorusso , C.X. Yuan , S. Nishimura , H. Baba , G. Benzoni , F. Browne , K.Y. Chae , F.C.L. Crespi , P. Doornenbal , N. Fukuda , R. Gernhäuser , G. Gey , Z.X. Zhou

{"title":"Shape evolution in neutron-rich Rh isotopes: First measurement of negative-parity isomers in 117,119Rh","authors":"J.Z. Zhang , Z.Q. Chen , T. Qu , Y.K. Wang , Z.H. Li , H. Hua , P.W. Zhao , H. Watanabe , G. Lorusso , C.X. Yuan , S. Nishimura , H. Baba , G. Benzoni , F. Browne , K.Y. Chae , F.C.L. Crespi , P. Doornenbal , N. Fukuda , R. Gernhäuser , G. Gey , Z.X. Zhou","doi":"10.1016/j.physletb.2025.140144","DOIUrl":"10.1016/j.physletb.2025.140144","url":null,"abstract":"<div><div>The <em>β</em>-delayed <em>γ</em>-ray spectroscopy of neutron-rich <sup>117,119</sup>Rh isotopes has been investigated at the Radioactive Isotope Beam Factory of RIKEN. The <span><math><mrow><mn>1</mn><mo>/</mo><msup><mn>2</mn><mo>−</mo></msup></mrow></math></span> isomers in <sup>117,119</sup>Rh have been identified for the first time. The systematics of energy differences between the <span><math><mrow><mn>9</mn><mo>/</mo><msup><mn>2</mn><mo>+</mo></msup></mrow></math></span> and <span><math><mrow><mn>1</mn><mo>/</mo><msup><mn>2</mn><mo>−</mo></msup></mrow></math></span> states have been extended up to <span><math><mrow><mi>N</mi><mo>=</mo><mn>74</mn></mrow></math></span>, which shows a tendency to first increase with the neutron number <em>N</em>, then reach a maximum at <em>N</em> ≈ 68, and subsequently decrease. Self-consistent triaxial relativistic Hartree-Bogoliubov (TRHB) calculations highlight the crucial role of triaxial deformation, particularly in the positive-parity states, in driving the observed evolution of energy differences. A shape transition from axially symmetric to triaxial and back to axially symmetric deformation is suggested along the Rh isotopic chain. These findings provide new insights into the structure of neutron-rich nuclei in the <em>A</em> ∼ 110 region and motivate further studies of exotic isotopes in this region to explore the interplay between triaxiality and shell evolution.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"873 ","pages":"Article 140144"},"PeriodicalIF":4.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0